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LATHL EUR TURNING POLYGONAL FORMS.

,118. Pebteilisfad- June 27, 1882 wnsningmn. DZ C.

(No Mae.) 2 sheets-sheen 2.:

' C. C. PEGK. LATHB FOR TURNING POLYGGNAL PURMS. No. 260,118.

` Patented JuneY 27, 1882.

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' UNIT-ED STATES PATENT OFFICE.

GASSIUS C. PECK, OF YORK, N. Y.

LATH El "F'O'R yTURNIN G POLYGO'NA L FO'R IVIS.

' nisPJrCIrICA'rION yforming pere of Lettere meent No. 2605-118, dated June 27, 1882.

Application filed July 30, 1881. (Nomodel.)

vTo all-whomt may concern:

sides-of the blanks lin an larcfof a circle lproportionate to their distancefromsaid-lathecenter.

The object of my invention `is to more fet'- fectually and conveniently secure the blanks .in position and to compensate'for any slight variations in the `lengths'of the blanks; and to thisfend'my invention-consists primarllyin the arrangement and adaptation of elastic gaskets, against which the ends ofthe blanks are caused to impiuge 5 secondly,fin thespecial arrangement and-construction of theseveral parts of the apparatus Ifor renderingfit more effective and convenient in'use, includingv a device for-holding andsupporting the'blanks in position WhileA the .-'marchine is being-filled, and `before vthey are securedby `the longitudinal adjustment-of Vthe disks or Vsecuring-ring.

In the accompanying drawings, Figure =1 is a side elevation of myimproved apparatus,

the upper halt' being shown in central vertical section; andtFig.-2 isa transverse section, looking toward the end diskwhich supports the adjustable annular securing-ring.

The shaft A is mounted upon suitable bearings, and is provided Witha .power-pulley, a. Two parallel disks,B and G,are arranged upon this shaft, either one or both of which are relatively adjustable, as preferred. In the drawings both are shown as adjustable longitudinally upon the shaft, and are prevented from turning independently and laterally upon the latter by wedge shaped keys b and o, which are inserted between their hubs and the shaft.

The hubs of the disks B and G are provided with suitable recesses or grooves for the reception of the keys, and the shaft is correspondingly grooved, as shown at a', or planed, as shown at a?, to furnish a bearing for the underside of .the-keys and prevent their movemeut laterally.

lThemoreeffectually-to securethc-disks in the-desiredposition, I provide each hub with `a set-screw, b c', which is employed to grip the key underneath and -prevent the possibility of the latter becomingloosc or displaced.

yEach disk is provided with-an annular or cylindrical, shoulderfbz'c?, concentric with the lathc-center, for the reception and support of therespective ends-of the blanks.

'Ihe walls ofthe disks project beyond these shoulders and furnish radial bearings b3 c3. Each-of 4these 'radial' bearings may be `adapted to re- Ac'eivethedirect iinpiugerneut-ot the ends of vthe-blanks, as-showu in the case of one of the disks, B. .I-prefer, hoWever,-to;provide one of Lthe disks, as (l, with an adjustable annular tighteningring, D,.iitting and moving longitudinally upon its cylindrical shoulder-0, and

to-employ theradial bearing c3 in this-case as va lfulcrumffor a series oflongitudiually-adjust- 'abl e-screws, S, for regulating the position of fsaid.anuularitightening-ring D.

In additiontothe handle s, each adjustingscrew-is provided with a rectangular or other yangular head, s', to vprovide-for the employ- 'ment-of a wrench when necessary.

Iam aware that set-screws have been Aemzployed vheretofore in a lathe for turning polygonal-'forms,.in connection with au adjustable i anuularfiiangeforsecuriug blanks in position;

but-insuch casesthe'set-screws project'radioulybe-employed to-securetthe iiange'in1apoisitipn previously obtained, whereas in .my

`device the-set-screwsarc placed Vlon gitudinall y iwi-th thetcenterotthe lathe, and are employed to adjust'andforce the securing-ring into position, in addition to sustaining it in therequired position when attained. I iind that a series of longitudinally-adjustable screws, by allowing a variable adjustment of pressure upon the tightening ring at different points,

are better adapted to secure'the blanks in positipn when there are variations in the length ofthe latter than when the said ring is pressed forward bodily with a uniform pressure throughout its whole extent.

Suitable gaskets, G, of elastic material are secured to one or both of the radial bearings, bf o3, of the opposing disks, or to the adj usta- IOO ble tightening-ring D. Any material affording the necessary amount of elasticity may be employed for this purpose, although I prefer to employ caoutchouc gaskets,and to spring them into dovetailed recesses b4 c, formed for this purposein the bearin g-shoulders,as shown in the drawings. The elastic bearin g-surfaees thus furnished compensate for any slight variation that may exist in the relative lengths of the blanks without compressing or otherwise injuring the ends ofthe latter, and enable me to secure them in position more readily and effectually than heretofore.

In order to secure the accurate alignment of the blanks parallel to each other in longitudinal planes radial from the center of the lathe, I provide each disk with a series of projections or shoulders, b5 c5, each being directly opposite to one of the series on the other disk, so that in placing the disks in the apparatus it is only necessary to have a particular side rest at each extremity' against the opposite pins or shoulders on each disk. In thus placing the blanks in the apparatus they are preferably arranged against these shoulders or projections in such manner that the latter are opposed to and sustain the blanks against the action of the cutting-tool.

For the purpose of retaining the blanks in position while the apparatus is being filled, and before they are finally secured by the longitudinal adjustment of the disks or tightening-ring, I provide a temporary sustaining device, M, so arranged as to encircle the lower half of the cylinder formed by the blanks when in position, and sustain them against gravity. A simple and effective method of doing this is by the use of one or more endless ropes or belts, M, of sufficient extent to encircle the cylinder of blanks when in position, and to extend over a pulley, N, attached to a weighted lever, O, above the same, which allows the rope or belt to travel with the disks as they are revolved during the operation of filling, and at the same time keeps it taut, irrespective of the number of blanks in position.

By the use of the continuous endless belt I am enabled to ll or empty the apparatus without reversing its motion, and at the saine time am also enabled to turn or reverse the blanks upon theirlongitudinal axes to presenta fresh surface to be acted upon by the euttingtool without removing said blanks from their positions inthe apparatus or disturbing the other blanks.

What I claim as my invention is- 1. In a lathe for turning polygonal forms, a disk adapted to receive the ends of a series of blanks, when provided with an elastic gasket for the purpose, and substantially in the manner designated, in combination with an opposing disk or abutment for receiving and supporting the opposite ends of the series of blanks, substantially as herein set forth.

2. In a lathe for turning polygonal forms, an adjustable securing ring or ilange mounted upon a cylindrical shoulder formed upon a suitable disk, and adapted to receive the ends of a series of blanks, when provided with an elastic gasket for the purpose, and substantially in the manner described, in combination with an opposing disk or abutment for receiving and supporting the opposite ends of the series oi' blanks, substantially as herein set forth.

3. In a lathe for turning polygonal forms, provided with an adjustable securing-ring, monntedupon a cylindrical shoulder formed upon a suitable disk adapted to receive the ends of a series ot' blanks, a series of setscrews provided with bearings on said disk, with their longitudinal axes parallel with that of the lathe-center, for the purpose otl forcibly adjusting and sustaining the securing-ring, substantially in the manner described, in combination with an opposing disk or abutment for receiv-r ing and supporting. the opposite ends of the series of blanksl substantially as herein set forth. f

4.' The temporary sustaining device adapted to support the blanks during the operations of filling or removing the blanks from the apparatus, or while turning the blanks upontheir longitudinal axes, substantially in thev manner and for the purposes set forth, consisting essentially of an endless belt suspended upon a pulley attached to a weighted lever-that automatically adapts itself to and renders the said belt taut when in use, and whereby the operations of filling, adjusting, and removing may be performed without reversing the motion of the apparatus, substantially in the manner and for the purposes described.

CASSIUS C. PECK.

Witnesses: v

GEO. W. MIATT, GEO. H.. EVANS.

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